Stencil-printing apparatus.



No. 700,03l. Patented may I3, 1902;;

n. GESTET-NEB. STENCIL PRINTING APPABATUS.

(Application filed Feb. 1, 1902.) (N6 Model.) 1 Shee ts-Sheet L No. 700,03r.

'Patunted May I3, 1902.-

n GEST'ETNER. STENCIL PRINTING APPARATUS.

(Application filed Feb. 1, 1902.)

(No Model.)

7 shoets sheet 2.

Patented May I3, I902.

No. 700,03l.

D) GESTETNEB. STENCIL PRINTING APPARATUS.

(AbpTica-tion filed. Feb. 1, 1902.)

I 7 Shuts-Sheet 3..

(lo Ilodel.)

N O Q Q o o PatentedMay '13, I902.

' n. GESTETNER. STENCIL PRINTING APPARATUS.

(Application filed Feb. 1, 1902.)

7 Sheets-Sheet 4,

(N0 M odel.)

. Patented May I3, I902. D. GESTETNER. STENCIL PRINTING APPARATUS.

No. 700,03I.

(Application filed Feb. 1, L902.)

7 Sheets-Sheet 5.

(No Model.)

o1. WASHINGTDN o c Patented May l3, I902.

D. GESTETNER. STENCIL PRINTING APPARATUS.

(Application filed Feb. 1, 1902.) (No Model.)

7 Sheets8heat 6.,

-THE'HUIRIS PETERS w l moroumo msy uuyun. c. 1-

H Patented May l3, I902.

D. GESTETNER.

STENCIL 'PRINTING APPARATUS.

(App1ication.fl1edFeb. 1,1902. (No 7 Shee'ts-Sheet 7.

view, Fig. 3,,a front View.

UNITED STATES PATENT ()FricE.

DAVID GESTETNER, OF LONDON, ENGLAND.

STENCILPRINTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 700,031, dated May 13, 1902.

Application filed February 1,1902. Serial No. 92,144. (No model.)

To all whono it ntay concern:

Beit known that I,DAVID GnsrnrNnma subject of the King ofGreat Britain, residing at London, England,have invented certain new and useful Improvements in Stencil-Printing Apparatus, of which the following isa full,

clear, and exact description, and for which I have made applications for patents in Great Britain, France, Belgium, Germany, Austria, Switzerland, and Italy, all dated December 12, 1901, and in Hungary and Russia, both dated December 17, 1901.

The invention relates to that class of Figure 1 is a ,vertical cross-section on the line 1 1 Fig. 3, looking toward the left handof my improved machine. Fig. 2 is an end y W V FigI iis avertical cross-section on the line 14, Fig. 3, looking toward the right hand and showing the parts in position for feeding the paper. Fig. 5 is a similar section to Fig. 4, showing the parts in printing position. Fig. 6 is a plan of parts carrying and giving motion to the waver-rollers. Fig. 7 is a sectional elevation showing parts for giving motion to the impression-roller and paper-stop in their inoperative position. Fig. 8 is a view of parts of the endless bands, porous sheet, and means for attaching the latter to the bands. Fig. 9 is a view of part of the porous sheet separately. Fig. 10 is a sectional view of parts of the stencil-clamp. Fig. 11 is a plan of a part of the feed-board. Fig. 12 is a plan of its corresponding trough-shaped support. Fig. 13 is an elevation of the rising and falling plate and of part of the'wedge-piece acting thereon. Fig. 14 is an elevation of one of the arms of the paper-stop with the stop in section, and Fig. 15 is an elevation of one of the cam-faced levers acting on the paper-stop arms.

According to my invention Iemploy a pair of rollers a 66*, the roller a being'mounted on a fixed shaft a, forming a tie-bar to the end frames 6 I), while the roller a"- is mounted on a shaft a passing through blocks a mounted in slots 1)? in the end frames and acted upon by springs a to give the roller a a normal upward tendency. Around each end of these rollers I place an endlessband 0, preferably formed of lengths of steel connected together at their ends by hinges o. By the action of the springs a on the roller (1* these bands are kept constantly stretched and yet accommodate themselves to slight irregularities. 1 cause these rollers a of and endless bands 0 to move together without slip by fixing studs a -around the edges of the rollers and by forming holesc in the bands, through which the studs a pass. The rollers a of are each formed with a recess of at each end to prevent the ink from traveling to the endless bands 0 and other parts. Motion is given to these rollers a 01F, and consequently to the bands 0, by means of a hand-lever a on the outer end of an axle of, mounted in the end frame Z) and having a pinion a on its inner end, which gears with a pinion 01. fixed to the roller 0.. r

' d is a sheet of porous material, preferably what is known as yoshino paper,which is secured to the endless bands 0, preferably in the following manner: One end d of the porous sheet (Z is strengthened by cementing thereon a stronger material, and the edge of such end is further strengthened by a strip of metal or other suitable material (1 (see Figs. 3 and 8,) formed with keyhole-slots cl to pass'over studs 0 on a bar c fixed at its ends to the bands 0. The other end of the porous sheet d has attached thereto a pocket d formed of stronger material and provided with a number of holes d along its extreme edge. Through this pocket the bar e is passed. This bar 6 has projections e thereon, which when the bar e is in proper position within the pocket (1 are passed through the holes (1 andthus retain the porous sheet din proper position during work. By forming theprojections e. a rounded shape, as shown, and by previously forming the holes d in the pocket (1 I avoid injury to the porous sheet when placing it on the bar 6, facilitate'its adjustment, and prevent possible injury to the attendant. The porous shoot (1 is also made impervious from its ends to about the line c to keep the ends of the stencil free from ink, and thus prevent inking the impression-roller, copies, (be. The bar 6 has a stud e at each end, by which it is connected to the bands 0 by means of springs e, removably connected at one end to such studs and connected at the other end to fixtures e on the bands 0. To control the position of these sprin gs and prevent possible injury in working, I pass guidewires 0 through such springs and connect the ends thereof to the fixtures e and e.

fis the stencil, which is attached at one end to the bands 0 by a clamp having a solid bar or base f, fixed at each end to the bands 0 and provided with a hooked or undercut projection f at each end. Over this bar one end of the stencil is placed, and over this a trough-shaped cover f is passed, so as to clip the stencil between the base and the cover. To secure this cover f to the base f, it has at one end a pin f which is passed underneath one of the projectionsf while its other end is provided with a spring-actuated bolt f (see Figs. 3 and 10,) the nose of which is passed underneath the other projection f. The stencil is then laid smoothly over the porous sheet (I, to which it is caused to adhere by the ink absorbed by such sheet. The bolt f has a finger-piece f by means of which it is operated. To remove a stencil from the clamp and attach a new stencil, the cover f ,is raised, when the stencil can be removed and a new stencil placed in position over the base f and secured by pressing down the cover f Ink is supplied to and distributed on the rollers a a* by waver-rollers g, which are mounted and actuated as follows, (see Figs. 2, 3, 6:) The waver-roller shafts g'are passed at each end through blocks 9 mounted in open-ended slots in the ends of levers g to enable them to be removed when required and are held in such slots by springs 9 attached to studs g 9 so as to give the rollers g a constant pressure against the rollers a a. One of the levers g has a third arm g through a slot or hole in which passes loosely the upper end of a lever g mounted on the fixed spindle a. The lower end of this lever q is rounded and placed within a slot h, formed in a bar h, operated at one end by an eccentric 7L2 on the cam-wheel 7L receiving motion by its ring of teeth from the pinion a". This bar. 7L is pin-jointed at the outer end to a lever i, mounted at its upperend on a stud t" on an adjustable sliding bar i acted upon by a screw i The impression-roller j, which is of indiarubber or other flexible material, has itsaxle mounted in slotsj, formed in carriersj supported by springsj which latter rest on swivcling rings 7' mounted in the outer ends of armsf, fixed to the shaft). The carriers j are rigidly connected together by a-rod f, and they each have a downwardly-projecting limb j which passes through the spring j 'pression-rollerj to the printing position.

and ringj, by which latter it is guided. The carriers are controlled in their motion by links j", pin-jointed thereto and to the end frames b b, and they are caused to rise by the following means: On one of the arms 3' is a pin j in position to be lifted by a hook 75, formed on a lifting-plate k, pin-jointed at k to a plate Z. This plate is capable of vertical motion, being formed with slots l P, through which pass, respectively, the axle of the cam-wheel 7r and a pin b fixed in the end frame I) and having a roller 11 mounted thereon. The plate Zhas a roller Z mounted thereon and located vertically over the roller 1). A wedge-piece m, pin-jointed at one end to the lever 11, has its guiding partm inserted between the rollers Z) and 1 so that when it is slid toward the right hand the incline or wedge part m will in the normal working of the machine raise the plate Z and with it the lifting-plate k, which latter will raise the im- A cam h on the cam -wheel 72, acts against a roller Z on the plate I to gently lower the latter in relative proportion to the motion of the rollers a a.

By rotating the screw i in one or the other direction the position of the stud t" is varied, the object of which is to bring the impressionrollerj sooner or later into the printing position and to suitably time the action of the paper-stop n. The movement of the stud t" is shown by a pointer i traveling over a scale i on the outside of the end frame Z),the pointer being mounted on the axis 2' and a pin on its upper end being engaged in a slot 1' in the sliding bar n is the paper-stop. It is carried at each end by arms a, mounted by slots 02 on a shaft a on which latter are fixed cam-faced levers n acting upon pins n, fixed in the sides of the arms '21,. These arms 11 are acted upon by springs a, connected thereto and to the end frames 1) b to pull the stop it forward when permitted.

The plate Z has at its lower part an incline Z terminating at its upper part in a recess partly inclosed by a nosepiece Z. This incline Z in the upward motion of tho platel acts against a roller 01 on one of the camfaced levers n to push back the paper-stop n, and the inner face of the nosepicce Z in the downward motion of the platel by acting on the roller n assists to bring the cam-levers back to their forward position, thereby permitting free forward motion to the paperstop n.

\Vhen the paper-stop n is in acting position, it rests upon and prevents any motion of the impression-rollerj. Its first motion is to rise a little above said rollerj in order that it may not in retiring give any motion to said roller, and thus interfere with the adjustment of the paper to be printed. This slight upward motion of the paper-stop n is obtained by the action of the inclines or cam-faces of the levers 11 against the pins 12 such motion being permitted by the slots 11. of the arms n.

Then when the pins a have risen into the curved recesses at the upper ends of the inclines on the levers n the latter act to push the paper-stop to its rearward position, thereby permitting of the rise of the impressionroller j. r

To enable the rollers a of and waver-rollers g to be rotated without printing or soiling the impression-roller j, I adopt the following arrangement: One end of a horizontal bar 0 is pin-jointed at 0 to the lifting-plate 7c, and its other end has a slot 0 within which is located a pin 0 fixed eccentrically to a disk on the inner end of a short shaft 0*, theouter end of which has fixed thereon a weighted lever 0 which can be thrown over against stops 0 to one or other side of the shaft 0 When the weighted lever o is in the position shown at Figs. 2, 4t, and 5, the machine is in condition for printing; but when it is turned over to the position shown at Fig. 7 the lifting-plate 7c is drawn by the bar 0 to the left, so as to remove the hook out of the way of the pin 7' Then in rotating the machine the plate Z will be raised to its highest position and at the same time the dependent footpiece p, pin-jointed to the lifting-plate 7c, will fall back over and rest upon the shaft n (see Fig. 7,) thereby keeping the plateZ and lifting-plate 7c in their highest position, so that neither the wedge-piece he nor the cam h? can give any motion to the said parts, and consequently no motion will be given to theimpression-roller and paper-stop, which will be retained in their inoperative positions. A spring is, attached at 70 to the lifting-plate 7c and to one of the armsj acts to pull forward the lifting-plate 70, so that its hook 71; comes under the pin 9' as soon as it is low enough, and the plate 70 has a tailpiece 70 to limit its backward motion by coming against the shaft n and to prevent the hook getting over the pin 3' assists in the downward motion of the parts Z, k, and p and in retaining them in the nonoperative position until the footpicce p is pushed off the shaft 01 On the weighted lever 0 and consequently the plate Z, being thrown back to their normal position the lifting-plate 7c is pulled forward by the spring and a peg k on the lifting-plate 7c pushes the footpiece 19 off the shaft n thereby allowing the parts l, is, and p to fall low enough to enable the hook 7c to pass under the pinj the parts being then again in their normal working position.

The shaft 01 is cut away, as shown at Fig. 7, to enable the footpiece p to fall rapidly when it has moved slightly, sidewise. The hook I is'allowed to fall lower than is necessaryto enable it to get under the pin j so that the paper-stop can be operated before the iInpresson-roller commences to rise.

An adjustable side fence q is frictionally mounted on a tie-rod q to regulate the po'si* tion sidewise of the paper in feeding, and

The spring it also springs g two of which are fixed on the rod q and one on the side fence, act to keep the paper down on the feed-boardr, and thereby prevent the paper on being fed forward from being accidentally pushed against the inked surface of roller a. By the use of an adj ustable side fence mounted, as above described, independent of the feed-board the side register is maintained notwithstanding any movement of the feed-board.

s is a receiving-tray for the printed sheets. This tray is divided and made telescopic, as shown, so that the parts can slide on each other to open them out for use or to stow them away under the machine when the latter is not in use.

tis a counter of any known and suitable construction, 13 is the operating-lever thereof, and t is a link pin-jointed to the latter and to one of the links j. By this arrangement the counter is only operated at each rise of the impression-roller for printing.

The feed-board r is held in troughshaped supports 1' on the end frames 1) b, and a spring-catch r is used to lock it in position for use. To facilitate insertion of the feed board 1' inthe supports 1", a gap r is made in one edge of the board, and a gap 7' is made in the upper side of one of the supports r. By placing the left-hand edge in its corresponding support and raising the right-hand edge just above its support the projection r when it comes against the stop 4" can be dropped through the gap 0".

u Lb are suitably guided wedge shaped plates, the wedge portions of which are located between the shafts g, so that when the cover '0 is'placed over the machine parts v in said cover by pressing on the tops 11. of said wedgesh'aped plates press the latter down,and thereby pushthe shafts g sidewise and separate the rollers g from the rollers a a*. This arrangement enables me to use composition rollers without the risk of their becoming flattened when the machine is idle. 1

\Vhat I claim as myinvention, and desire to' secure by Letters Patent, is-

1. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands passed around the ends of said rollers, a porous'sheet attached to said bands, 7

a clamp on said bands to hold one end of a stencil the body of which is laid smoothly over and adheres to the surface of'th'e' inked porous sheet, and waver or distributing rollers in contact with the inkingrollers, of means for automatically giving to and-fro endwise motion to said waver-rollers, a flexible impression-roller, and a paper-stop, both automatically operated,substantially as herein set forth.

2'. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet attached to said bands, a-clam-p on said bands to hold one end of a stencil,- waver or distributing rollers in contact with the inking-rollers, and a flexible impression-roller, of means for automatically raising the impression-roller to the printing position and removing it therefrom, substantially as herein set forth.

3. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, and waver or distributing rollers in contact with the inking-rollers, of a flexible impression-roller, a paper-stop against which the paper to be printed is placed, and means for automatically placing said stop in position for use and removing it therefrom, substantially as herein set forth.

4. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, and waver or distributing rollers in contact with the inking-rollers, of a flexible impression-roller, and means for varying the time at which the impression-roller and paper-stop come into operative position without changing the time at which the impression-roller leaves the printing position, substantially as herein set forth.

5. The combination with stencil-printing -in contact with the inking-rollers, of a flexible impression-roller, a paper-stop, and means for throwing the impression-roller and paperstop out of operative position while the inking and waver rollers are left free to revolve, substantially as herein set forth.

6. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet in contact with the inking-rollers, and a stencil supported by said bands and porous sheet, of spring-supports to the upperinkingroller to maintain the tension of the endless bands, substantially as herein set forth.

7. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and stencil attached to said bands, and waver or distributing rollers in contact with the inkingrollers, of blocks in which the waver-roller axles are supported at each end, open-ended slotted levers in which said blocks are carried, springs connecting together each pair of blocks to keep the waver-rollers in constant contact with the inking-rollers when the machine is in use, a lever mounted on an axle and giving motion to one of such slotted levers, and an eccentric for giving motion to said slotted lever, substantially as herein set forth.

8. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, and waver or distributing rollers, of wedgeshaped plates placed between the axles of the waver-rollers in position to be depressed by the cover being placed over the machine, thereby automatically separating the waverrollers from the inking-rollers, substantially as herein set forth.

9. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, waver or distributing rollers in contact'with the inking-rollers, an impression-roller, and a paper-stop, of a guided rising and falling plate, a lifting-plate pin-jointed to said guided plate, a dependent footpiece pin-jointed to said lifting-plate, a spring attached to said lifting-plate and to one of the levers carrying the impression-roller, and a wedge-piece operated by an eccentric to lift said guided plate to give the required motion to the impressionroller and paper-stop in the'n'ormal working of the machine, substantially as herein set forth.

10. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, waver or distributing rollers in contact with the inking-rollers, and a flexible impressionroller, of spring-supported carriers for said roller, arms supporting said carriers, a shaft on which such arms are fixed,links pin'jointed to the carriers and end frames for controlling the motion of the carriers, a pin on one of said arms, a hook on a lifting-plate to act with said pin, and a rising and falling plate to which said lifting-plate is pivoted to lift the impression-roller to the printing position, substantially as herein set forth.

11. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, waver or distributing rollers, and an impression-roller, of a paper-stop, arms carrying said stop, slots in said arms, a shaft passing through said slots, pins in sides of said arms, cam-faced levers fixed on said shaft to act against said pins, springs attached to said arms and to the end frames to pull the stop forward, a rising and falling plate, an incline and a nosepiece on said plate, and a roller on one of the cam-faced levers acted upon by said incline and nosepieee to operate the paper-stop, substantially as herein set forth.

12. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil carried by said bands, waver or distributing rollers, and a flexible impression-roller, of a paper-stop, arms carrying said step, slots in said arms, a shaft passing through said slots, and cam-faced levers acting against said arms to first raise the stop slightly above the impression-roller and then to push said stop back, substantially as hereinsct forth.

ICC

13. The combination with stencil-printing apparatus having two inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, waver or distributing rollers, and an impression-roller, of a sliding bar, a screw to move said bar back and forth to adjust the time of raising the impression-rollena lever pin-jointed to said bar, abar pin-jointed to said lever and operated by an eccentric to give motion thereto, a wedge-piece pin-jointed to said lever, and a rising and falling plate acted upon by said Wedge-pieceto raise the impressionroller to the printing position, substantially as herein set forth.

14. The combination with stencil-printing apparatus havingtwo inking-rollers, a pair of endless bands around said rollers, a porous sheet and a stencil attached to said bands, waver or distributing rollers, an impression roller, and a paper-stop, of a slotted bar, a lifting-plate giving motion to the impressionroller and paper-stop and to which such slotted baris pivoted, a shaft, a crank-pin on said shaft acting Within said slot, and a Weighted lever to operate such shaft so as to enable the impression-roller and paper-stop to be put in or out of operation, substantially as herein set forth.

15. The combination with stencil-printing apparatus having a pair of inking-rollers, endless bands passing around said rollers, and a porous sheet and stencil removably attached to said bands, of a strengthened edge on the porous sheet, keyhole-slots in said strengthened edge, a pocket of stronger material attached to the other edge of said porous sheet, and holes perforated along the edge of said pocket, substantially as herein set forth.

16. The combination with stencil-printing apparatus having a pair of inking-rollers, endless bands passing around said rollers, and a porous sheet and stencil removably attached to said bands, of a bar fixed to said bands, studs on said bar, a strengthened edge on the porous sheet, keyhole-slots in said strengthened edge, a pocket of stronger material attached to the other edge of said porous sheet, holes perforated along the edge of said pocket, a removable bar having rounded projections thereon to pass through said holes,and springs to connect such removable barwith' the endless bands, substantially as herein set forth.

17. The combinatiouwith stencil-printing apparatus having a pair of rollers, endless bands passing around said rollers, and a porous sheet and stencil removably attached to saidbands, of a clamp-base fixed to the endless bands, and a'trough-shaped cover removably attached to saidbase to secure one edge of thestencil,substantially as herein set forth. In testimony whereof I affix my signature in presence of two witnesses.

B. J. B. MILLS, CLAUDEK. MILLS. 

